Portable radio telephone



Jan 30, 1951 R H. RIMES 2,539,477

PORTABLE RADIO TELEPHONE Filed Jan. 24, 1945 Robert H. RiIIBS INVENTOR.

I BY

ATTORNEY Patented Jan. 30-, 1951 omnzo STATES PATENT OFFICE 2,539,477 Poa'rAn aAnIo TELEPHONE Robert Harvey Rincs, Brookline, Mass.

Application January 24, 1945, Serial No. 574,303

The present invention relates to radio transmission, and more particularly to portable radiotelephone sets.

Anobject of the invention is to provide a new and improved portableradio-telephone set.

Another object of the invention is to provide a supple modulated transmitter.

Other and further objects will be explained hereinafter and will be particularly pointed out in the a pended claims.

The invention will now be more fully explained in connection with the accompanying drawing, the single figure of which is a longitudinal section embodying the invention in preferred form.

As disclosed in my copending application, Serial No. 192,167, filed June 23, 1943, radio waves energizing an: antenna may be modulated by sonic contact with a vibrating member or column. This principle is made use or according to the present invention, in which the antenna 2 carried by a portable support 4, is mechanically connected rigidly to a vibratory member 6. The antenna 2 is of the type that emits radio waves into space in- -res'ponse to electrical excitation by radio-frequency energy drawn by the antenna from a radio-frequency energy generating electric systemmri-or to-the emission of the radio-frequency energy as radio waves. A radio-frequency" oscillator 8 constitutes such an electric system or source of radio-frequency energy connected to l the antenna by a transmission line in orderthat the antenna may draw radio-frequency energy from the electric system, thereby to cause the antenna to emit radio waves into space.

The vertical antenna 2 produces and emits a bundle of rays of radio waves in a predeterminted field pattern. In the horizontal plane, rays are emitted from'each circumferential portion of the antenna in a corresponding predetermined radial direction, producing an omnidirectional field pattern. In the vertical plane, a directional field pattern is produced, there being no end-on radiati n The mechanical vibrations of the vibratory member 6 may be produced by talking into a hollow sonic voice chamber in. The voice sounds will cause mechanical vibrations of the member 6, which extends into and mechanically vibrates the antenna 2 in the end-on direction, which is at an angle toall the directions in which radio waves are emitted, and at right angles to the horizontal field pattern. These mechanical vibrations instantaneously vary the dimensions of the antenna 2 at frequencies dependent upon the frequency or the vibrations, thereby exerting corre- 11 Claims. (c1. 250 17) 2 spending variations in the energy drawn from theelee trici system The radio-frequency waves emitted by the antenna 2 are therefore modulated in response to the mechanical speech vibrations oithe vibratory member 6.

The same antenna may be adapted to receive amplitude-modulated waves which, after amplification by an amplifierlZ, may be demodulated h a ete ifl ne ed to a l uds k Those elements may also be supported by the portable Support 3. The oscillator 8 may be connectedinto circuit for transmissionby a pushbutton switch l8, and the amplifier and detector l2, ll ior reception by a push-button switch 20'. Modifications-and scope of the invention, as defined in the appended claims, will occur to those skilled in the art.

What is claimed is: 1. A radio transmitter having, in combination,

a portable support, a source of radio-frequency energy carried by the support, an antenna carried by the support excited from the source to emit radio waves, and a vibratory member carried by the support and to which the antenna is mechan ically connected to vibrate the antenna mechan ically during the emission of the radio waves to cause the antenna to effect modulation of the emitted radio waves as an inherent response to its mechanical vibration.

2., A radio-telephone transmitter having, in combination, a sourceof radio-frequency energy, an antenna excitedirom the source to emit a bi n l 'o a ad aves. ac ray aims: a predetermined direction, and speech-responsive me ns fo a y n a men io o i santeni a during-the emission of the radio waves to effect n ch dul i n o th mitted acl o Wa e whileiretaining for eachray'itspredetermined direction,

3. A radio transmitter having, in combination, a source of radio-frequency energy, an antenna excited from the source to emit radio Waves into space, and a sonic chamber mechanically vibratory in response to sound waves and mechanically connected to the antenna to effect mechanical vibration of the antenna in response to the mechanical vibrations of the sonic chamber, thereby to effect modulation of the emitted radio Waves.

4. A radio-telephone transmitter having, in combination, a source of radio-frequency energy, an antenna excited from the source to emit radio waves into space, and a voice chamber mechanically vibratory in response to speech and mechanically connected to the antenna to effect mechanical vibration of the antenna in response to the mechanical vibrations of the voice chamber,

thereby to effect speech modulation of the emitted radio waves.

5. An electromagnetic system having, in combination, a sonic chamber, and means for exciting the external surface of the chamber electromagnetically to emit electromagnetic waves into space, the sonic chamber being vibratory in response to sound waves to effect modulation of the emitted waves.

6. A radio transmitter having, in combination, a portable support, an antenna carried by the support of the type that emits radio waves into space in reponse to electrical excitation by radiofrequency energy drawn by the antenna from a radio-frequency-energy-generating electric system prior to the emission of the radio-frequency energy as radio waves, an electric system carried by the support for generating radio-frequency energy, means electrically connecting the antenna to the electric system in order that the antenna may draw radio-frequency energy from the electric sytem, thereby to cause the antenna to emit radio waves into space, and a member carried :by the support for varying a dimension of the antenna, thereby to effect modulation of the radio waves emitted by the antenna.

7. A radio-telephone transmitter having, in combination, an antenna of the type that emits radio waves into space in response to electrical excitation by radio-frequency energy drawn by the antenna from a radio-frequency-energy-generating electric system prior to the emission of the radio-frequency energy as radio waves, an electric system for generating radio-frequency energy, means electrically connecting the antenna to the electric system in order that the antenna may draw radio-frequency energy from by the electric system, thereby to cause the antenna to emit radio'waves into space, means responsive to vibrations of speech frequency, and means controlled by the vibration-responsive means for varying a dimension of the antenna in response to the vibrations of speech frequency, thereby to effect modulation at speech frequency of the radio waves emitted by the antenna.

8'. A radio-telephone transmitter as defined in claim 7 in which the speech-responsive means comprises a voice chamber mechanically vibratory in response to speech.

9. A radio-telephone transmitter having, in combination, an electric system for generating radio-frequency energy, an antenna electrically connected to the electric system in order that the antenna may draw radio-frequency energy therefrom to emit radio waves, and speech-responsive means for varying the length of the antenna in 4 response to speech during the emission of the radio waves to modulate the radio waves.

10. In a radio transmitter having an antenna of the type that emits radio waves into space in response to electrical excitation by radio-frequency energy drawn by the antenna from a radio-frequency-energy-generating electric system prior to the emission of the radio-frequency energy as radio waves, a method of the character described that comprises feeding radio-frequency energy from the electric system in order that the antenna may draw radio-frequency energy from the electric system, thereby to cause the antenna to emit radio waves into space, producing vibrations of speech frequency, and varying a dimension of the antenna in response to the vibrations of speech frequency during the emission of the radio waves by the antenna in order to effect modulation of the radio waves emitted by the antenna.

11. A radio transmitter having, in combination, an antenna of the type that emits radio Waves into space in response to electrical excitation by radio-frequency energy drawn by the antenna from a radio-frequency-energy-generating electric system prior to the emission of the radiofrequency energy as radio waves, an electric system for generating radio-frequency energy, means electrically connecting the antenna to the electric system in order that the antenna may draw the radio-frequenc energy from the electric system, thereby to cause the antenna to emit radio waves into space, a mechanically vibratory member, and means mechanically connecting the antenna to the mechanically vibratory member to vary a dimension of the antenna mechanically in response to the mechanical vibrations of the mechanically vibratory member, thereby to effect modulation of the radio waves emitted by' the antenna and in which the vibratory member comprises a sonic chamber mechanically vibratory in response to sound waves.

ROBERT HARVEY RINES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,763,220 Chromy June 10, 1930 2,061,508 Dallenbach Nov. 17, 1936 2,461,005 SOuthworth Feb. 8,1949

FOREIGN PATENTS Number Country Date 694,523 Germany Aug. 2, 1940 

